fix tests

Author: chiliu

src/mcp/server/fastmcp/server.py

@@ -854,7 +854,6 @@ async def handle_streamable_http(request: Request) -> Response:
             routes=routes,
             middleware=middleware,
             lifespan=lambda app: self.session_manager.run(),
-            redirect_slashes=False,
         )
 
     async def list_prompts(self) -> list[MCPPrompt]:

tests/server/fastmcp/test_server.py

@@ -129,16 +129,13 @@ async def test_starlette_routes_with_mount_path(self):
 
         # Find routes by type
         streamable_routes = [r for r in app.routes if isinstance(r, Route)]
-        mount_routes = [r for r in app.routes if isinstance(r, Mount)]
 
         # Verify routes exist
         assert len(streamable_routes) == 2, "Should have two streamable routes"
 
         # Verify path values
         assert streamable_routes[0].path == "/mcp", "Streamable route path should be /mcp"
-        assert streamable_routes[1].path == "/mcp/", "Streamable route path should be /mcp"
-
-
+        assert streamable_routes[1].path == "/mcp/", "Streamable route path should be /mcp/"
 
     @pytest.mark.anyio
     async def test_non_ascii_description(self):